Stairway.



UNITED sTATns PATENT onirica.

ornaat-Es PAULsoN, or New YORK, N. Y.

STAIRWAY.

. Specification of Letters Patent.

Patented May 21, 1907.

A `v.To all whom it may concern.-

Be it known that I, CHARLES E. PAULsoN,

Va citizen of the United States of America, rel siding 1n the borough' of Manhattan, in the city, county, and State of New York, have invented certain new and useful Improve-l ments 1n Stairways, ofwhich the following is `a specification.

My 'nvention is particularly applicableto stairways constructed of iron orsteel, having treads of wood, stone, concrete or other suitable material, suchas .are common in modern fireproof buildings, and the particular object molded into moderate cost.

which I have in yiew is to construct the same so 4that the various parts. can` be pressed or pl'am orornamental forms at -g In the accompanying drawings Figure 1 vis a lsection of a step to which my invention isapplied, taken on the line 1-2 in Fig. 3 ,'Fig.

'-2 is a similar'` section of a step to which my inuvention isapplied in modified form; Fig. 3 is a section on the line 5 6, Fig. 1; Fi 4 is a V 'section on the 'line 3-4 in Figs. 1 an 3 and Fig'. 5 is a section ,similar to that shown in Fig. l1, showing a niodiiied form of my-inven'- tion.

. In modernlreproof' buildings. the structural members of a stairway are usually made` of cast iron or rolledsteel sections. If made of steel tle various parts must be madeof -sup ort the heavy soiit plates bof the upp metal too heavy to be easily ressed or mold-` ings where 'this arrangement is shown, the thlckne'ss of the plates has been greatly exaggerated for the purpose of illustration.

.Referring to the drawings, it will be seen that in the iirst four figuresfI have shown the riser made of a heavy steel plate a, of Sullicient thickness or gage to meet the requirements of the building regulations,.and a very thin plate c of light metal which may be readily pressed into ornamental form. The heavy plate ais offset at top 'and bottom r(Flg. 2) to er y lower treads.- 4This plate b, which supports the tread f, extends over the riser plate v4L as shown in Fig. 2 or is made integral with 4it (Fig. 1), if desired. Both of these plates are secured to the strings y' and c by any suit'- able means, for example they may be bolted at g to angle pieces h on the strings.

When the riser is thus made with a heavy steel late a, the-plate c of the lightest gage meta practicable, is secured in front of the same, or-ld, Fig.' 2) behind it, or (e, Fig. 2) Vunderneath. the soffit plate b or (i, Fig. 3) along the ex osed portions of the string. vAlthough of l1 ht weight, it is my inten ion to make this plate c sufficiently heavy to a .ford considerable reinforcing strength to the plates c and b, I thereby render it ossi'ble tc use lightergage. metal in these ates. @n the other hand the plate c being secured thereto is thereby protected from being accidentally knocked out of shape. It' will be l seen atonce that by means of this plate c any desired form of ornamentation may be at- In portions of the framework, notably the riser, the heavyv platey a may be altogether eliminated,- sufficient strength being pro-- vided for this. part by doubling the ornamental late c. In Fig. 5, I'show such a plate c dou led back u on itself, and offset at top and, bottom in t e same manner as the plate a, in'Fig. 2.

The means for securin' various plates with whic `it coacts may be adapted to suit the wishes ofv the builder.

the plate. c to the In Fig. 1,'I have shown the upper ed e of the plate angled so as to'project over an rest on the u per surface ol the sofiit plate b and thus e secured between the latter and the superimposed tread. TheA lower `edge-of the plate is also extended downward so as to be secured between the lower tread' and the plate 0,-. But it is-also advisable, to attach IOO the plate rmly asfshown in Fig. 4 bythe l bolts grwhich secure the plate a to the angle piece 71, on vthe string. Where the soll-it plate b is made as a separate piece (Fig. 2) the plate c may be secured at its upper edge -between the angled edge of the plate a andv the lower face of the sohit plate b m the manner illustrated.; Other convenientwways .of

securingv the plates will readily suggest them- Y- selves.

Considerable variation the use of .my in-' vention is ,l ossible and I donot wish to limit myself to t e specific-forms herein' shown and described. l

thicknesses together so that they mutually I claim. asgmy invention l.' A stair having risers composed of a plurality of thicknesses of metal, one of which is adaptedvto be pressed into ornamental form, in combination with means for securing said reinforce each other, substantially as de.-

, l scribed.

nesses together so that 'they mutually reinforce each other, substantially as described.

3. A stair having 'risers,'soits and strings,

each of 4which is composed of a plurality of thicknesses of metal one of which is adapted to be pressed into ornamental for1n,in combination with means for securing said thicknesses togetherlso that they mutuallyreinforce each other, substantially as described.

In testimony whereof .Ib` have'signed'my f nameto this specificationfin the pm sence of two'subscribing Witnesses.l E t? CHAS. E PAULSGN.

Witnesses:

WALTER ABBE,

WILLIAM ABB/E. 

